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Finding the Fourth Proportional to 134.80, 201.89 and 121.13

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Solution

The fourth proportional to 134.80, 201.89 and 121.13 is: 181.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    134.80 : 201.89 = 121.13 : x
  2. Step 2: Convert to fraction form
    134.80/201.89 = 121.13/x
  3. Step 3: Cross multiply
    134.80x = 201.89 × 121.13
  4. Step 4: Simplify right side
    134.80x = 24,454.99
  5. Step 5: Solve for x
    x = 24,454.99/134.80
  6. Step 6: Final answer
    x = 181.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.